package com.itheima.a01staticdemo2;

public class ArrUtil {
    private ArrUtil(){}

    public static String printArr(int[] arr){
        StringBuilder sb = new StringBuilder();
        sb.append("[");
        for (int i = 0; i < arr.length; i++) {
            if(i == arr.length - 1){
                sb.append(arr[i]);
            }else{
                sb.append(arr[i]+",");
            }
        }
        sb.append("]");
        return sb.toString();
    }

    public static double getAverage(double[] arr){
        double sum = 0;
        for (int i = 0; i < arr.length; i++) {
            sum += arr[i];
        }
        return sum/arr.length;
    }
}
